Subtract 8/21 from 9/35
9/35 - 8/21 is -13/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 35 × 3 = 105,
9/35 = 9 × 3/35 × 3 = 27/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
8/21 = 8 × 5/21 × 5 = 40/105 - Subtract the two like fractions:
27/105 - 40/105 = 27 - 40/105 = -13/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/35-8/21 9/35-16/21 9/70-8/21 9/35-8/42 27/35-8/21 9/35-24/21 9/35-8/63 45/35-8/21 9/35-40/21 63/35-8/21 9/35-56/21